Back panel audio no longer recognized after upgrade 12.3->13.1

Hi, I just upgraded from 12.3 to 13.1 and pulse audio no longer recognized that I have a back panel audio plugged in. It still shows the front panel and even correctly detects whether it is plugged, but my back panel audio doesn’t seem to work (no audio playing) and doesn’t appear in the list (just front-panel and line-out).

Any idea how to diagnose/fix this?